You asked about SaaS
Nobody in the register described anything this way.
| Launched | What it was | Today |
|---|---|---|
| 2019-01-01 | YCHatch The AI CSR Platform · usehatch.ai | acquired |
| 2019-06-01 | YCVendr The AI negotiation agent to help you save money on SaaS. · vendr.com | acquired |
| 2020-06-01 | AI-powered user assistance platform · command.ai | acquired |
| 2022-06-01 | YCTigerEye AI for Construction · tigereye.com | acquired |
| 2019-01-01 | Talent AI improving quality of hire · searchlight.ai | acquired |
| 2017-01-01 | YCScribe Scribe is an AI based Sales Development Representative that you can… · tryscribe.com | acquired |
| 2020-06-01 | Humanloop is the LLM evals platform for enterprises. · humanloop.com | acquired |
| 2022-01-01 | YCHOAi AI agent for community management · hoai.com | acquired |
| 2023-01-01 | Know what your LLM is doing — and why it’s failing · traceloop.com | acquired |
| 2020-06-01 | YCBrevy Empower your customer service team through AI & automation. · brevy.com | acquired |
| 2017-06-01 | AI support agent for your business that actually works · percept.ai | acquired |
| 2020-01-01 | Build & launch your website in minutes with AI · typedream.com | acquired |
| 2023-01-01 | YCLume Speed up customer implementation with AI · lume.ai | acquired |
| 2019-01-01 | YCWindsor AI Powered Personalized Videos · windsor.io | acquired |
| 2021-01-01 | YCFriz AI Social Media Manager · usefriz.com | acquired |
| 2024-06-01 | YCRemade AI-native canvas for creative workflows. · remade.ai | acquired |
| 2021-06-01 | YCBytebot Bytebot is the open source container for AI desktop agents. · bytebot.ai | acquired |
| 2021-06-01 | YCVogent Build Voice AI Agents · vogent.ai | acquired |
| 2023-01-01 | YCCardinal Your AI product backlog · cardinalapp.io | acquired |
| 2021-06-01 | YCMentum AI-Powered Assistant for Procurement and Strategic Sourcing · getmentum.com | acquired |
| 2023-01-01 | YCDashdive Break down AI and cloud costs by feature and customer · dashdive.com | acquired |
| 2023-06-01 | YCChatter Dead simple LLM testing and iteration · chatter.anish.xyz | acquired |
How this compares
The register re-probes every domain it holds. Some that answered last month stop answering. We send that list — what went quiet, and what it was — once a month. Nothing else.
How this was made. Show HN entries are every post from 2021 to 2023 with at least five points that linked to its own domain; code hosts and free hosting are excluded, because a repository outlives the effort behind it. Product Hunt entries needed 100 votes — a far higher bar, so they are the promoted top slice rather than a like-for-like sample. Both are judged by asking the domain whether it still answers: gone means it no longer resolves, refuses the connection, serves a parking page, or says plainly that it shut down. An HTTP error is not counted as gone — a server answering 404 is one somebody still pays for, and an audit of 25 gone-calls found two such sites alive with only a moved homepage. Y Combinator entries use the status YC publishes itself, which is why only those can say acquired. Squatted domains — a lapsed name now serving somebody else's site — are not detected, so these figures run slightly low.